https://www.drdo.gov.in/drdo/pub/dss/2009/main/2-CEMILAC.pdf
Take care of all the modifications suggested by CAEMILAC in the above paper and there will be increase in performance.
And if Tejas Mk1A's airframe is to be modified then go for cranked wing delta.
This alone should be able to surpass all the performance metrics for IAF.

One more Idea to improve mark 1....
We need to develop a good in house WVR AAM.
And put Tejas on international market
Tejas version with current MMR + with options of either Indian or French/Israel AAM's + Kaveri/GE engine
With weight under 6000Kg, We will have many takers for a product like this which has all Indian subsystems so there is no issue of sanctions at any point of time...
And we can have Tejas NG with AESA + BVR+ Higher Power engine + Anti Shipping/ Land attack ALCM for advanced markets later on once we take care of IAF.

The best way to improve LCA, is to keep it simple and focused light loads and capabilities.

1) Add the RecceLite pod, to make it useful in reconnaissance roles. Which would make even MK1 more useful.
2) Add Harpoon on the centerline, for maritime attack roles, similar to Jaguar IM (again possible with MK1).
3) Add Helina on twin or triple launchers if possible for CAS roles

Tejas doesn't need to be a high end fighter, but a capable light class fighter!

@TPFscopes, if you have more information on HF-73, kindly open a new thread. I'd like to learn more about it.

Click to expand...

No need to start another thread for HF-73.
HF-73 was a improved Marut and exactly according to the IAF ASQR for HF-24. It is very similar that LCA mk-2 will provide only what was requested for LCA.
As said earlier, mk1 is inefficient, mk1a is a compromise but mk2 will be a complete product but most of the guys here have unrealistic expectations with mk-2.

Hf-73 was scrapped in favour in Jaguar to fulfill IAF requirements on urgent basis and Govt stopped fundings for hf-73 due to which it remains in dark forever..